Updating a table from another table who is damon wayans dating

------------------------------------------------------------------------- | name | family | phone | email | gender | phone2 | address | birthdate | ------------------------------------------------------------------------- in table #1 columns address and phone2 is empty and columns gender and birthdate values is same as table #2.

How can I read data from table #2 and update address and phone2 in table #1 with values from table #2 address and phone columns when gender and birthdate is the same in each row?

When asked the reason was he had no idea how to use multiple tables with the help of the JOIN clause in the UPDATE statement. Additionally, we want to update the values of Col2 and Col3 only.

When you look at this it looks very simple but when we try to think the solution, I have seen developers coming up with many different solutions for example sometime they write cursor, table variables, local variables etc. Col2)) UPDATE CTE SET Col1 = _Col1, Col2 = _Col2from stackoverflow.“UPDATE Table1 SET Col2 = t2.

statement can be accomplished in one of two ways, primarily depending upon which version of SQL Server you are using.

We’ll briefly explore both options so you can find what works best for you.

Specifies the temporary named result set or view, also known as common table expression (CTE), defined within the scope of the UPDATE statement.

In recent times I have seen a developer writing a cursor to update a table. We want to update the value from Table2 to Table1 for the rows where Col1 is 21 and 31. I resolved this by providing the alias name after update query:: UPDATE Table1 SET Col2 = t2.

Thanks [email protected] Doe if you have a performance question ask a new question and supply details of the table sizes, structures, indexes and execution plans.

I don't understand what you are asking in point 2 please edit your question and supply example table structures that demonstrate the issue you are asking [email protected] Doe: If you mean by column you mean a column value (in other words, a matching row) – when there is no matching row, no error is raised.

You can additionally use MERGE statement to do the same as well, however I personally prefer this method.

Let us clean up the clause by dropping the tables which we have created.performance wise I liked; (not my! guess you already covered it somewhere..; WITH CTE AS (SELECT T1.